Mold for making cement fence-posts.



. J. M. DENNING.

MOLD FOR MAKING CEMENT FENCE POSTS.

APPLIOATION FILED 001. 20, 1908.

Patented Jan. 19; 1909.

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JOSEPH M. DENNING, OF

CEDAR RAPIDS, IOWA, ASSIGNOR TO PYRAMID POST AND POLE COMPANY, OF CEDARRAPIDS, IOWA, A CORPORATION OF SOUTH DAKOTA.

MOLD FOR MAKING CEMENT FENCE-POSTS.

Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed October 20, 1908. Serial No. 458,621.

To all whom it may concern:

Be it known that I, JOSEPH M. DENNING, a citizen of the United States,residing at Cedar Rapids, in the county of Linn and State of Iowa, haveinvented certain new and useful Improvements in Molds for Making CementF ence-Posts, of which the r'ollowing is a specification.

The molds of the present invention is intended more particularly for themaking of fence posts of the style shown in Patent No. 836,128, issuedNovember 20, 1906, although the mold can be used for the making of fenceposts of a shape other than that disclosed in such patent.

The present invention relates to metal molds for the making of cementfence posts or similar elongated structures; and the object of theinvention is to provide a mold, the parts of which are easily separablefor the purpose of removing the post after it has set and hardened,thereby enabling the post to be quickly and easily removed and the moldto be cleaned, if necessary, prior to subsequent usage. In the making ofcement structures of this kind, it sometimes happens that pieces ofcement or mortar adhere to the mold after a post has been drawntherefrom, so that, unless provision is made for the cleaning out ofsuch fragments, the posts thereafter molded will have rough spots orimperfections in the surface. The mold of the present invention is soconstructed that it can be easily collapsed by a suit-ably applied shockor jar, which frees the molded post from the mold and at the same timepermits the two sections to be cleaned prior to again assembling themfor future operations.

The invention consists in the features of construction and combinationof parts hereinafter described and claimed. a

In the drawings, Figure 1 is a side elevation of the mold with themolded post ready for discharge; Fig. 2 a similar view showing the moldpartly disassembled for the purpose of removing the completed post; andFig. 3 a cross sectional view, showing the interlocking members.

The mold of the present invention is particularly shaped to form a fencepost of trefoil design in cross section, although, obviously, theconfiguration of the mold could be varied considerably without changingthe character of the invention.

The mold consists of a section 4:, which may be termed the body section,and a section which may be termed the cover section and, as shown inFig. 3, the edges of the cover section overlap the edges of the bodysection sufficiently to hold the sections clamped together and provide ajoint which will prevent the escape of cement when poured into the mold.The sections are slightly tapered, from end to end, which gives to themold, as a whole, a tapered formation; and, in order to prevent theoutflow of cement from the smaller end, during the molding operation, acap 6 is provided which is secured to a bracket 7, which latter isriveted or otherwise rigidly attached to the cover section of the mold,the opposite or enlarged end of the mold being left open to receive thecement. The cover section, at its enlarged end, is provided with anoutwardly projecting foot 8 which, as shown, is composed of a bar orsection of T iron, riveted or otherwise secured to the cover section ofthe mold. The tapered formation of the body and cover sections is suchthat when the two sections are properly in register they will wedgetogether, which wedging action is possible by reason of the overlappingedges of the cover, which are carried around sufliciently to engage thesides of the body section and prevent disengagement of the two sections,save only by an endwise movement in the right direction. The sectionsare thus held together during the molding operation by the provision ofa plurality of pins 9 which are entered diagonally through the cover andthe side walls of the body section and diverge from one another fromfront to rear. The pins are preferably arranged in staggered relation toone another, so that when the cement is poured into the mold, holes, instaggered arrangement and extending diagonally through the post, will beprovided for the reception of fastening means fol-holding the fence inplace when applied.

\Vhen it is desired to use the mold, it is placed in a vertical positionwith the open end up, and the two sections wedged together and held bythe insertion of the pins. The cement is then poured in in a fluidcondition and thereafter allowed to set and harden. \Vhen in conditionfor removal, the mold is turned with its large open end down, as shownin Fig. l, and the pins removed by pulling them out from the holes,

' movement to disengage the two sections previously wedged together.This action either entirely disengages the sections, allowing the moldto collapse and the post to be removed, or it sufl'iciently loosens thesections so that they can afterwards be taken apart without anydifficulty. The arrangement is one which affords access to the interiorof the body and cover sections, which can thus be easily cleaned ifparticles of cement or other substances are found to be adhering to theinterior. Thereafter the parts can be readily assembled and the pinsinserted for further molding operation.

What I regard as new and desire to secure by Letters Patent is:

1. Amold of the class described, comprising two sections formed tointerlock together, and a foot on one of the sections adapted to imparta shock or jar to said section for the purpose of disengaging thesections, substantially as described.

2. Amold of the class described, comprising two sections of taperingformation adapted to interlock together by means of a wedging action,and a foot on one of the sections adapted to impart a shock or jar tosaid section, for the purpose of disengaging the sections, substantiallyas described.

3. A mold of the class described, comprising two sections of taperingformation adapted to interlock together by means of a wedging action, afoot on one of the sections adapted to impart a shock or jar to saidsection for the purpose of disengaging the sections, and pins enteredthrough the sections for holding them in interlocked position to formholes in the completed post, substantially as described.

at. A mold of the class described, comprising two interlocking sections,the edges of one of the sections overlying the edges of the othersection, and a foot on one ofthe sections adapted to impart thereto alongitudinal movement for disengaging the sections, substantially asdescribed.

5. A mold of the class described, comprising two tapering cooperatingsections adapted to be interlocked by a wedging action, the edgessections, and pins entered through the sections for holding them ininterlocked relation and in position to form holes in the completedpost, substantially as described.

7 A mold of substantially triangular formation, comprising a bodysection forming two sides of the mold, and a cover'section forming oneside of the mold the edges of said cover section overlying and engagingthe edges of the body section, and a foot on one of the sections adaptedto impart a shock or jar to said section, for the purpose of disengagingthe section by a longitudinal ment, substantially as described.

8. A mold substantially triangular in cross section and tapering fromend to end and composed of a body section forming two sides moveof themold and a cover section forming the third side of the mold, the edge ofsaid cover section overlapping the edges of the body section andinterlocked therewith, and a foot on the cover section adapted to imparta shock or jar thereto, for permitting the sections to be disengaged bya continued movement of the body section, substantially as described;

9. A mold substantially triangular in cross section and tapering fromend to end and composed of a body section forming two sides of the moldand a cover section forming the third side of the mold, the edge of saidcover section overlapping the edges of the body section and interlockedtherewith, a foot, on the cover section adapted to impart a shock or jarthereto, for permitting the sections to be disengaged by a continuedmovement of the body section, and diagonally extending pins enteredthrough the cover and the sides of the body section for holding thesections in interlocked position and positioned to form holes in thecompleted post, substantially as described. JOSEPH M. DENNING.Witnesses:

HARVEY J. HUBER, N. J. Turns.

